If there's a real deficiency, it should be managed with blood tests.
Growing up and recently, I've been anemic (iron deficient) without any obvious medical cause. That requires supplementation with an unusual amount of iron.
Also, I'm vitamin A deficient at baseline and have to take large amounts, around 15k IU/day, to stay within the "normal" range. (50% above ordinary UL.)
Growing up and recently, I've been anemic (iron deficient) without any obvious medical cause. That requires supplementation with an unusual amount of iron.
Also, I'm vitamin A deficient at baseline and have to take large amounts, around 15k IU/day, to stay within the "normal" range. (50% above ordinary UL.)